Crosstalk detecting apparatus

(19)

(11)

EP 0 559 494 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	07.12.1994 Bulletin 1994/49

(43)	Date of publication A2:
	08.09.1993 Bulletin 1993/36

(21)	Application number: 93301694.1

(22)	Date of filing: 05.03.1993

(51)	International Patent Classification (IPC)⁵: G11B 5/596, G11B 21/10

(84)	Designated Contracting States:
	DE FR GB

(30)

Priority:

05.03.1992 JP 48673/92

(71)	Applicant: PIONEER ELECTRONIC CORPORATION
	Meguro-ku Tokyo (JP)

(72)	Inventor:
	Okuda, Yoshiyuki, c/o Pioneer Tokorozawa Plant Tokorozawa-City, Saitama (JP)

(74)	Representative: Tomlinson, Kerry John et al
	Frank B. Dehn & Co. European Patent Attorneys Imperial House 15-19 Kingsway London WC2B 6UZ London WC2B 6UZ (GB)

(56)

References cited: :

(54)	Crosstalk detecting apparatus

(57) This invention relates to a crosstalk detecting apparatus for detecting crosstalk which possibly occurs when reading an image signal which has been FM-modulated and recorded on a recording medium, and more specifically, a crosstalk detecting apparatus which derives an amount of crosstalk from an adjacent track based on a signal read by a pickup in a simple construction. The cross-talk detecting apparatus according to the present invention is adapted to detect crosstalk during a period in which an identification signal recorded on a medium is being read therefrom, and comprises an FM-demodulator (1) for demodulating a signal read from the medium, an AM-demodulator (2) for reading the signal read from the medium, a multiplier circuit (4) for multiplying a signal outputted from the FM-demodulator (1) with a signal outputted from the AM-demodulator (3) and an averaging circuit (6) for averaging output values of the multiplier circuit (4).

Search report